The film is structured into three episodes: "Goblin Frequency," "Electric Brain," and "Life Water." The protagonists of each episode face harrowing experiences: a fisherman loses his life to the pond's ominous aura, a Bitcoin miner loses his mother by following computer instructions, and a person experiences bizarre physical changes after drinking the pond water.

Seo-yeon, a promising high school hurdler, trains tirelessly and dreams of joining a professional team. When her father, a truck driver, suffers a stroke, she borrows from a relative for her father's medical expenses, pledging to repay the loan once she joins a professional team. When that falls through, she must make a fateful choice.

Disillusioned with her work life, Mun-gyeong goes on a vacation to Mungyeong City on a whim. There, she and Ga-eun, a Buddhist nun who was taking travelling practice, rescue a stray dog, Gil-soon. The three unite and spend a night of emotional solidarity at an old lady's house.